It is a challenge for the human body to maintain stable blood pressure while standing. The body's failure to do so can lead to dizziness or even fainting. For decades it has been postulated that the vestibular organ can prevent a drop in pressure during a position change--supposedly mediated by reflexes to the cardiovascular system. We show--for the first time--a significant correlation between...

We present a robust method for time-frequency model estimation. It involves a robust Leclerc’s estimator to ensure robustness w.r.t. noise and interferences present in timefrequency representations. This scheme is applied to fish age and growth analysis from otolith images. This application involves the estimation of the parameters of a priori fish growth models using this robust time-frequency...

It is generally accepted that the formation of otolith microstructures (L- and D-zones) and in particular the organic and mineral fractions vary on a daily basis. Raman microspectrometry provides a nondestructive technique that can be used to provide structural information on organic and mineral compounds. We applied it to thin otolith sections of hake in order to address the following issues: ...

Acknowledgments: Authors thank Tom Bennett and Valerie Stallings for their technical contributions, Margaret Marsden and Patty Cunningham for their administrative assistance, and Drs. Lionel Zupan and Rick Lewis for commenting on early versions of the manuscript. Experiments were performed at the Legacy Neurotology Research Laboratory. ABSTRACT To investigate the neural mechanisms that humans u...

Otolith morphology analysis is one of the main tools used for fish or stock identification. Moreover, otolith shape can also be in animal dietary studies (stomach content) identification prey fishes and their size according to relationship between sizes. In present study, length morphological dimensions was investigated sabre squirrelfish, Sargocentron spiniferum (Forsskål, 1775) (family: Holoc...

in this paper age determination and morphological characteristics of blacktip catfish, plicofollis dussumieri, from oman sea were evaluated. a total of 132 fish specimens were collected from fishing trawlers or landings from march 2011 to july 2012, with minimum and maximum of 245 mm, 195 g; and 767 mm, 5801 g, respectively. maximum life span was 12 years for the length range of 245 – 767 mm fl...

Second-order vestibular neurons (2 degrees VN) were identified in the isolated frog brain by the presence of monosynaptic excitatory postsynaptic potentials (EPSPs) after separate electrical stimulation of individual vestibular nerve branches. Combinations of one macular and the three semicircular canal nerve branches or combinations of two macular nerve branches were stimulated separately in d...

Pagellus acarne is found in coastal waters worldwide and it includes important species of commercial recreational fisheries. In this study, 16 morphometric variables the sagittal otolith, including six characters, shape indices, four ecomorphological indexes, were investigated for first time among P. stocks collected from Aegean Marmara Seas coasts Turkey. Statistically significant differences ...

Brain-derived neurotrophic factor (BDNF) is known to be crucial for the development of peripheral vestibular neurons. However, the maturation profile of the BDNF signal transducing receptor, tyrosine kinase B (TrkB) in functionally activated otolith-related vestibular nuclear neurons of postnatal rats remains unexplored. In the present study, conscious Sprague-Dawley rats (P4 to adult) were sub...